Arnd Bergmann, testing gcc-8, encountered the following:
> This is an interesting regression with gcc-8, showing a harmless
> warning for correct code:
>
>In file included from include/linux/kernel.h:13:0,
> ...
> from drivers/scsi/lpfc/lpfc_debugfs.c:23:
> include/linux/printk.h:301:2: error: 'eq' may be used
> uninitialized in this function [-Werror=maybe-uninitialized]
> printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
> ^~~~~~
> In file included from drivers/scsi/lpfc/lpfc_debugfs.c:58:0:
> drivers/scsi/lpfc/lpfc_debugfs.h:451:31: note: 'eq' was
> declared here
The code is fine: a for loop which if there's at least 1 itteration,
will assign eq a value. Followed by an if test that checks for no
itterations and assigns eq a default value. But the checker doesn't
see the relationship between the two so assumes eq may not a have a
value.
I believe, simply initializing with a NULL will solve the issue.
Signed-off-by: James Smart <james.smart@xxxxxxxxxxxx>
---
drivers/scsi/lpfc/lpfc_debugfs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/lpfc/lpfc_debugfs.h b/drivers/scsi/lpfc/lpfc_debugfs.h
index 7b7d314af0e0..32e86d7813a0 100644
--- a/drivers/scsi/lpfc/lpfc_debugfs.h
+++ b/drivers/scsi/lpfc/lpfc_debugfs.h
@@ -448,7 +448,7 @@ lpfc_debug_dump_wq(struct lpfc_hba *phba, int qtype, int wqidx)
static inline void
lpfc_debug_dump_cq(struct lpfc_hba *phba, int qtype, int wqidx)
{
- struct lpfc_queue *wq, *cq, *eq;
+ struct lpfc_queue *wq, *cq, *eq = NULL;
char *qtypestr;
int eqidx;
--
2.13.1
